Hydraulic pumping-engine



(No Model.) v

G. W. DAWSON. HYDRAULIC PUMPING ENGINE.

Wilma/of@ UNITED STATES GEORGE W. DAWSON,

i PATENT OFFICE.

OE CHICAGO, ILLINOIS.

HYDRAULIC PUMPIYNGENGINE.

SPECIFICATION forming part of Letters Patent No. 478,314, dated July 5,1892. Application filed September 19, 1891. Serial llo. 406,170. (Nomodel.)

To @ZZ whom it may concern:

Be it known that I, GEORGE W. DAWSON, a citizen of the United States,residing at Chicago, In the county of Cook and State of Illinels, have4invented a new and useful Hydraulic Pumping-Engine, of which thefollowing is a specification.

My invention relates to pumps which are Operated by the pressure ofwater; and my objects are to provide a system of valves for both pumpand engine cylinders which are durable and simple and have a positivenoiseless movement for operating them, thus adapt- Ing the engine to usein private residences or any other situation where a noiseless machineof this kind is necessary.

Another object is to so` construct a pumping-engine that it will beadapted to raise the pressure of the water in the supply-pipes of a house to a higher pressure than the supply which operates the engine,thusiadapting it to .supply the upper stories of very high build- IngsIn places where the ordinary water-works pressure is not suflicient toattain this result.

These objects are attained by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 is a front side elevation of apumpingengine embodying my improvements. Fig. 2 is aleft-haud endelevation of Fig. 1. Fig. 3 is a rear side elevation of Fig. 1 with partof the pump and engine-cylinders broken away. This view is to showdetails of the valve-operating mechanism. Fig. 4 are respectively sideand top views ofthe rear valve-operatin g lever; Fig. 5, respectivelyside and top views of front valve-operating lever. Fig. 6 arerespectively top and end views of a clutch-collar which operates a leverand will be explained in connection therewith. Fig. 7 is a longitudinalsection on a horizontal plane of Fig. 1 on line a b, the pistons androds together with the valves and their levers being shown in elevation.Fig 8 shows valve in position for admitting water to one end of theengine or pump cylinder and also shows position by which water canescape from opposite end of cylinder. Fig. 9 shows valve in reverseposition from that shown in Fig. 8. Both Figs. 8 and 9 are sections ofthe valve and valveseat transversely of the valve in order to show therelation ofI passages in the valve with thosein the seat.

Similar letters refer to like parts throughout the several views.

A is the foundation-frame of the machine, to which at each end aresecured the ends of cylinders B and C. There are two A-shaped frames Dand E, having their feet attached to the ends 0f frame A, as shown. Theapex of frames D and E forms bearings for a transverse shaft c, and ateach end of shaft c is a lever, lever F being firmly secured to theshaft, while lever G is loosely mounted thereon. At one end ofthe hub dof lever G, Figs. 2 and 5, is notch e, in which operates a projection fof collar H, which collar is firmly secured to shaft c, Figs. 2 and 6.The jection fis narrower than the width of notch e for the purpose ofallowing shaft c, with collar H, to have a greater amount of motion thanis necessary for the hub of lever G, as will be more fully shown.

At the top of rear frame D is an upwardlyprojecting lugg, which has aside portion h Overhanging lever F near its center of length. Thisportion h has two faces t' and j, which stand at an angle of aboutthirty 'degrees to -a horizontal line. Set into the top face of lever Fare two cylinders of rubber la and k, which alternately contactwith thefaces i and j and act as stops, as will be shown. At each end of lever Fis a downwardly-projecting lug serving for the attachment of the ends ofa rod I, and sliding upon this rod is a ring l', and the ring isattached to the top end of a Spring J, the lower end of which isattached to the foundation of the machine. Secured rmly to shaft cbetween framesD and E are arms K and K', and rmly secured to thepiston-rod L of the machine is'an upwardly-projecting arm L', which isheld in a vertical position laterally by a rod-guide L, which passesthrough its center of length, as shown. Arm L has a rounded top l, whichhas a position between the lower ends of arms K and K.

As before stated, lever Gis loosely mounted upon shaft c, but its motionis limited. Lever G is confined from movement longitudinally with shaftc, but can have a limited rotary pro- Inovement. At the ends of lever Gare pivoted the upper ends of rods M and M the lower ends being pivotedto the outer ends of levers N and N', the inner ends of these leversbeing firmly secured to the outer end of the valve-stems of valves O andO'. Valves O and O' are of the rotary four-way variety and each has aspecial caseP in which to operate, the cases each being provided withfour openings for the attachment of pipe, as 1o shown in Figs. S and 9.The upper or supply pipes Q and R, Figs. l, 2, 8, and 9, are bothconnected to one pipe S, which is coniiccted with some source ofwater-supply.

Pipes T and T connects the valve with the` i5 one end of cylinders B andC, Fig. 7, and pipes U and U' connect the valves with the in end of thecylinders. Pipes V and V form exit passage-ways for the water from thecylinders through the valves. Pistons lV and 2o W are attached totheends of rod .L and are provided with the usual packing.

lt will be understood that this pumping-engine is more particularlyintended for increasing the pressure for house use above that usuallyattained by the water-works of cities in their street mains.

In using this system ot' pumping-engines even when cylinders B and C arethe same diameter the pressure in the house-pipes can 3o be nearlydoubled what it is when connected directly with the street-mains. Anyamount of pressure necessary for ordinary purposes iii the house-inainscan be attained by this system by making the pump-cylinder smaller thanthat of the engine or driving cylinder.

In `operation water under pressure is admitted to valves O and O frompipe S through vertical pipes Q and R. Then the several parts of thermachine have the position shown 4o in Fig. l, both valves O and O havethe position shown in Fig. S, whereby water under pressure passes fromthe pipes Q and R down through one of the passages in the valve and outinto the riglit-liand pipe U or T. (Shown by arrow.) As shown in thesection Fig. 7 the pressure of the Water causes pistons WV and XV tomove from right to left until the rounded end of arm L of piston-rod Lstrikes against the downwardly-projecting 5o lever K, Fig. l, which willcause the shaft c to slowly revolve and carry lever F to ahorizontalposition,wlien by the pressure of spring J ring I is slid along rod I tonear its middle of length, but a continuation of the revolution of shaftc causes it to carry lever F beyoud a horizontal position, when ring Iby the pressure ot spring J is suddenly slid to the opposite end of rodI from where the ring started and as suddenly accelerate the revolutionot 6o shaft c until lever F reaches an angle from the horizontal similarto that shown in Figs. l and El, when itis stopped from further movementby the rubber buters 7c or la contacting with one of the faces t or j ofupward projection h.

Since collar l-I is firmly attached to shaft c, its projection f, Figs.2 and 6, contacts with one side of notch e of hub d of lever G, andcause this lever to also assume a positionat an angie to the horizontal,as shown in Figs. ,l and 3, and lever G,`liaving rods M and M connectingit with the valve-levers N an d N so that the valves are rotated to theposition required only at the termination or near'tlie termination ofthe stroke of the pistons. lhe collar ll operates lever G only aftershaft c has begun and attained about one-halt of its partial revolution.The proj ectiou f of collar H. is so much narrower than the width ofnotch e in the hub of lever G that lever F is carried by the action ofthe piston in revolving shaft c until it is to a horizontal position, sothat the valves are reallyli changed very suddenly in their position bythe action of the spring J, causing the ring I to slide from the centerof the length of rod I to tlie.extreme end of said rod and causing theaction of the spring J to suddenly rotate shaft c more rapidly thancould be done `by the contact of the top endo:` arm L of piston-rod Lwith either of the levers K or K.

In using this pumping-enginefor increasing the pressure in house-mains,when it receives its supply of Water from the streetniains, we willassume that 4in Figs. l and 7 the right-liand cylinder is the pump andthe lef t-hand cylinder is the engine or power end. By the action of themechanism, as hereiribefore described, the valves are so operated at thetermination of the stroke `of the pistons ot' `both pump and enginecylinders th at water is alternately `admitted from pipe S to the end ofthe cylinders. In the power-cylinder pipe V is for carrying oft thewaste water from the lower side of the valve O, while pipe V of cylinderC is connected to the house-inains. It the pressure in pipe S, which isconnected with the street-mains, is fifty pounds to the square inch, thepiston in the left-haud cylinder B will be reciprocated under a pressureof about fifty pounds to the square inch. Piston "W is connected withpiston W by means of rod L, and water admitted to one side of thispiston from pipe S will also drive it along the bore of the cylinderwith a force of iifty pounds to the square inch, while water at theopposite side of this piston will be compressed with a force equal tothe combined pressure of the entering water from pipe S upon the ends ofboth pistons W' andW, since the water is allowed to go to waste in theend of cylinder B opposite to the `one in which water is being admittedunderpressure from pipe S. Thus a pressure equal to double that which isfurnished by the streetmains can be attained with pump and enginecylinder of the same capacity.

The rotary four-way valves employed and the means for operating them areperfectly noiseless, and the valves being changedin position whenthepistons have almost stopped at the end of `their stroke there is nowater hammering even when the machine is -run at as great a speed aswill be necessary when doing its full duty.

IOO

IIO

- What I claim as my invention, and desire to secure by Letters Patent,is-

1. A hydraulic pumping-engine consisting of two cylinders B and C, saidcylinders connected longitudinally by means of a frame A, said cylindershaving pistons WV and W', said pistons directly connected by a rod L,said rod having an upwardly-projecting arm L', Shaft c, mounted aboveand transversely of said rod, rmly secured tosaid shaft, tWo arms K andK', said arms having a" position in which they can be moved by Contactof the end Zot' arm L' when said arm is reciprocated, as described, bypiston-rod L, lever F, firmly attached to shaft c, said lever providedWith a rod I, suspended below and attached to said lever only at itsends, said rod having a ring I', which is capa ble ot' sliding the Wholelength of said rod bet-Ween the points of attachment of said rod, saidring having attached thereto a spring J, said spring operating in themanner and for the purpose described, the Whole operating in combinationwith lever G, loosely mounted on shaft c, said'lever .operated by lcontact of tongue f of collar H in notch e of the hub of lever G, saidlever connected with the valve-levers N and N' by rodslVI and M' for thepurpose of imparting a partial rotary motion to each valve at the timeandin the manner substantially as shown and described.

2. In a hydraulic pumping-engine, means for operating the valves whichcontrol the Water `to and from the machine, consisting of a transverseshaft c, lever F, attached at one end of said shaft and provided withthe described rod` I, upon which reciprocates ring I' of spring J in themanner and for the purpose described, and collar H, firmly secured tosaid shaft and capable of operating lever Gby the means, at the time andfor the purpose, sub- 4o stantially as shown and described.

GEORGE W. DAWSON.k

Witnesses S. LA ING WILLIAMS, FERDINAND L. BARNETT.

